[MVVM] Cannot suppress [RelayCommand] from JsonSerializer.Deserlialize with [JsonIgnore]

[stephenquan]

Describe the bug

I am using CommunityToolkit.Mvvm 8.2.2. I have the following ViewModel which I want to serialize to Json, but, unfortunately, the unwanted [RelayCommand] is appearing as well:

public partial class MainViewModel : ObservableObject
{
    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(Json))]
    private Int64 _acc = 0;

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(Json))]
    public Int64 _accPower = 1;

    [RelayCommand]
    private Task IncAcc()
    {
        Acc++;
        AccPower = AccPower * 2;
        return Task.CompletedTask;
    }

    [JsonIgnore]
    public string Json
    {
        get
        {
            try
            {
                return JsonSerializer.Serialize(this);
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }
    }
}

The value being returned by Json property is:

{"Acc":0,"AccPower":1,"IncAccCommand":{"ExecutionTask":null,"CanBeCanceled":false,"IsCancellationRequested":false,"IsRunning":false}}

The desired Json property is:

{"Acc":0,"AccPower":1}

Regression

No response

Steps to reproduce

I'm using the ViewModel in a Maui application with the following XAML:

<VerticalStackLayout>
    <Label Text="{Binding Acc, StringFormat='Acc: {0}'}" />
    <Label Text="{Binding AccPower, StringFormat='AccPower: {0}'}" />
    <Label Text="{Binding Json, StringFormat='Json: {0}'}" />
    <Button Text="Click me" Command="{Binding IncAccCommand}"/>
</VerticalStackLayout>

Expected behavior

I would like the Label that shows the Json property to show:

Json: {"Acc":0,"AccPower":1}

Screenshots

No response

IDE and version

VS 2022

IDE version

Visual Studio 17.7.4

Nuget packages

• [ ] CommunityToolkit.Common
• [ ] CommunityToolkit.Diagnostics
• [ ] CommunityToolkit.HighPerformance
• [X] CommunityToolkit.Mvvm (aka MVVM Toolkit)

Nuget package version(s)

CommunityToolkit.Mvvm 8.2.2

Additional context

No response

Help us help you

Yes, but only if others can assist

[Sergio0694]

Add [property: JsonIgnore] on the IncAcc method 🙂

Support was introduced in https://github.com/CommunityToolkit/dotnet/pull/630.